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        <a href="../.." >Text 节点和 DocumentFragment 节点</a>
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                                <h1 id="text-&#x8282;&#x70B9;&#x548C;-documentfragment-&#x8282;&#x70B9;">Text &#x8282;&#x70B9;&#x548C; DocumentFragment &#x8282;&#x70B9;</h1>
<h2 id="text-&#x8282;&#x70B9;&#x7684;&#x6982;&#x5FF5;">Text &#x8282;&#x70B9;&#x7684;&#x6982;&#x5FF5;</h2>
<p>&#x6587;&#x672C;&#x8282;&#x70B9;&#xFF08;<code>Text</code>&#xFF09;&#x4EE3;&#x8868;&#x5143;&#x7D20;&#x8282;&#x70B9;&#xFF08;<code>Element</code>&#xFF09;&#x548C;&#x5C5E;&#x6027;&#x8282;&#x70B9;&#xFF08;<code>Attribute</code>&#xFF09;&#x7684;&#x6587;&#x672C;&#x5185;&#x5BB9;&#x3002;&#x5982;&#x679C;&#x4E00;&#x4E2A;&#x8282;&#x70B9;&#x53EA;&#x5305;&#x542B;&#x4E00;&#x6BB5;&#x6587;&#x672C;&#xFF0C;&#x90A3;&#x4E48;&#x5B83;&#x5C31;&#x6709;&#x4E00;&#x4E2A;&#x6587;&#x672C;&#x5B50;&#x8282;&#x70B9;&#xFF0C;&#x4EE3;&#x8868;&#x8BE5;&#x8282;&#x70B9;&#x7684;&#x6587;&#x672C;&#x5185;&#x5BB9;&#x3002;</p>
<p>&#x901A;&#x5E38;&#x6211;&#x4EEC;&#x4F7F;&#x7528;&#x7236;&#x8282;&#x70B9;&#x7684;<code>firstChild</code>&#x3001;<code>nextSibling</code>&#x7B49;&#x5C5E;&#x6027;&#x83B7;&#x53D6;&#x6587;&#x672C;&#x8282;&#x70B9;&#xFF0C;&#x6216;&#x8005;&#x4F7F;&#x7528;<code>Document</code>&#x8282;&#x70B9;&#x7684;<code>createTextNode</code>&#x65B9;&#x6CD5;&#x521B;&#x9020;&#x4E00;&#x4E2A;&#x6587;&#x672C;&#x8282;&#x70B9;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x83B7;&#x53D6;&#x6587;&#x672C;&#x8282;&#x70B9;</span>
<span class="hljs-keyword">var</span> textNode = <span class="hljs-built_in">document</span>.querySelector(<span class="hljs-string">&apos;p&apos;</span>).firstChild;

<span class="hljs-comment">// &#x521B;&#x9020;&#x6587;&#x672C;&#x8282;&#x70B9;</span>
<span class="hljs-keyword">var</span> textNode = <span class="hljs-built_in">document</span>.createTextNode(<span class="hljs-string">&apos;Hi&apos;</span>);
<span class="hljs-built_in">document</span>.querySelector(<span class="hljs-string">&apos;div&apos;</span>).appendChild(textNode);
</code></pre>
<p>&#x6D4F;&#x89C8;&#x5668;&#x539F;&#x751F;&#x63D0;&#x4F9B;&#x4E00;&#x4E2A;<code>Text</code>&#x6784;&#x9020;&#x51FD;&#x6570;&#x3002;&#x5B83;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x6587;&#x672C;&#x8282;&#x70B9;&#x5B9E;&#x4F8B;&#x3002;&#x5B83;&#x7684;&#x53C2;&#x6570;&#x5C31;&#x662F;&#x8BE5;&#x6587;&#x672C;&#x8282;&#x70B9;&#x7684;&#x6587;&#x672C;&#x5185;&#x5BB9;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x7A7A;&#x5B57;&#x7B26;&#x4E32;</span>
<span class="hljs-keyword">var</span> text1 = <span class="hljs-keyword">new</span> Text();

<span class="hljs-comment">// &#x975E;&#x7A7A;&#x5B57;&#x7B26;&#x4E32;</span>
<span class="hljs-keyword">var</span> text2 = <span class="hljs-keyword">new</span> Text(<span class="hljs-string">&apos;This is a text node&apos;</span>);
</code></pre>
<p>&#x6CE8;&#x610F;&#xFF0C;&#x7531;&#x4E8E;&#x7A7A;&#x683C;&#x4E5F;&#x662F;&#x4E00;&#x4E2A;&#x5B57;&#x7B26;&#xFF0C;&#x6240;&#x4EE5;&#x54EA;&#x6015;&#x53EA;&#x6709;&#x4E00;&#x4E2A;&#x7A7A;&#x683C;&#xFF0C;&#x4E5F;&#x4F1A;&#x5F62;&#x6210;&#x6587;&#x672C;&#x8282;&#x70B9;&#x3002;&#x6BD4;&#x5982;&#xFF0C;<code>&lt;p&gt; &lt;/p&gt;</code>&#x5305;&#x542B;&#x4E00;&#x4E2A;&#x7A7A;&#x683C;&#xFF0C;&#x5B83;&#x7684;&#x5B50;&#x8282;&#x70B9;&#x5C31;&#x662F;&#x4E00;&#x4E2A;&#x6587;&#x672C;&#x8282;&#x70B9;&#x3002;</p>
<p>&#x6587;&#x672C;&#x8282;&#x70B9;&#x9664;&#x4E86;&#x7EE7;&#x627F;<code>Node</code>&#x63A5;&#x53E3;&#xFF0C;&#x8FD8;&#x7EE7;&#x627F;&#x4E86;<code>CharacterData</code>&#x63A5;&#x53E3;&#x3002;<code>Node</code>&#x63A5;&#x53E3;&#x7684;&#x5C5E;&#x6027;&#x548C;&#x65B9;&#x6CD5;&#x8BF7;&#x53C2;&#x8003;&#x300A;Node &#x63A5;&#x53E3;&#x300B;&#x4E00;&#x7AE0;&#xFF0C;&#x8FD9;&#x91CC;&#x4E0D;&#x518D;&#x91CD;&#x590D;&#x4ECB;&#x7ECD;&#x4E86;&#xFF0C;&#x4EE5;&#x4E0B;&#x7684;&#x5C5E;&#x6027;&#x548C;&#x65B9;&#x6CD5;&#x5927;&#x90E8;&#x5206;&#x6765;&#x81EA;<code>CharacterData</code>&#x63A5;&#x53E3;&#x3002;</p>
<h2 id="text-&#x8282;&#x70B9;&#x7684;&#x5C5E;&#x6027;">Text &#x8282;&#x70B9;&#x7684;&#x5C5E;&#x6027;</h2>
<h3 id="data">data</h3>
<p><code>data</code>&#x5C5E;&#x6027;&#x7B49;&#x540C;&#x4E8E;<code>nodeValue</code>&#x5C5E;&#x6027;&#xFF0C;&#x7528;&#x6765;&#x8BBE;&#x7F6E;&#x6216;&#x8BFB;&#x53D6;&#x6587;&#x672C;&#x8282;&#x70B9;&#x7684;&#x5185;&#x5BB9;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x8BFB;&#x53D6;&#x6587;&#x672C;&#x5185;&#x5BB9;</span>
<span class="hljs-built_in">document</span>.querySelector(<span class="hljs-string">&apos;p&apos;</span>).firstChild.data
<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E;</span>
<span class="hljs-built_in">document</span>.querySelector(<span class="hljs-string">&apos;p&apos;</span>).firstChild.nodeValue

<span class="hljs-comment">// &#x8BBE;&#x7F6E;&#x6587;&#x672C;&#x5185;&#x5BB9;</span>
<span class="hljs-built_in">document</span>.querySelector(<span class="hljs-string">&apos;p&apos;</span>).firstChild.data = <span class="hljs-string">&apos;Hello World&apos;</span>;
</code></pre>
<h3 id="wholetext">wholeText</h3>
<p><code>wholeText</code>&#x5C5E;&#x6027;&#x5C06;&#x5F53;&#x524D;&#x6587;&#x672C;&#x8282;&#x70B9;&#x4E0E;&#x6BD7;&#x90BB;&#x7684;&#x6587;&#x672C;&#x8282;&#x70B9;&#xFF0C;&#x4F5C;&#x4E3A;&#x4E00;&#x4E2A;&#x6574;&#x4F53;&#x8FD4;&#x56DE;&#x3002;&#x5927;&#x591A;&#x6570;&#x60C5;&#x51B5;&#x4E0B;&#xFF0C;<code>wholeText</code>&#x5C5E;&#x6027;&#x7684;&#x8FD4;&#x56DE;&#x503C;&#xFF0C;&#x4E0E;<code>data</code>&#x5C5E;&#x6027;&#x548C;<code>textContent</code>&#x5C5E;&#x6027;&#x76F8;&#x540C;&#x3002;&#x4F46;&#x662F;&#xFF0C;&#x67D0;&#x4E9B;&#x7279;&#x6B8A;&#x60C5;&#x51B5;&#x4F1A;&#x6709;&#x5DEE;&#x5F02;&#x3002;</p>
<p>&#x4E3E;&#x4F8B;&#x6765;&#x8BF4;&#xFF0C;HTML &#x4EE3;&#x7801;&#x5982;&#x4E0B;&#x3002;</p>
<pre><code class="lang-html"><span class="hljs-tag">&lt;<span class="hljs-name">p</span> <span class="hljs-attr">id</span>=<span class="hljs-string">&quot;para&quot;</span>&gt;</span>A <span class="hljs-tag">&lt;<span class="hljs-name">em</span>&gt;</span>B<span class="hljs-tag">&lt;/<span class="hljs-name">em</span>&gt;</span> C<span class="hljs-tag">&lt;/<span class="hljs-name">p</span>&gt;</span>
</code></pre>
<p>&#x8FD9;&#x65F6;&#xFF0C;&#x6587;&#x672C;&#x8282;&#x70B9;&#x7684;<code>wholeText</code>&#x5C5E;&#x6027;&#x548C;<code>data</code>&#x5C5E;&#x6027;&#xFF0C;&#x8FD4;&#x56DE;&#x503C;&#x76F8;&#x540C;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> el = <span class="hljs-built_in">document</span>.getElementById(<span class="hljs-string">&apos;para&apos;</span>);
el.firstChild.wholeText <span class="hljs-comment">// &quot;A &quot;</span>
el.firstChild.data <span class="hljs-comment">// &quot;A &quot;</span>
</code></pre>
<p>&#x4F46;&#x662F;&#xFF0C;&#x4E00;&#x65E6;&#x79FB;&#x9664;<code>&lt;em&gt;</code>&#x8282;&#x70B9;&#xFF0C;<code>wholeText</code>&#x5C5E;&#x6027;&#x4E0E;<code>data</code>&#x5C5E;&#x6027;&#x5C31;&#x4F1A;&#x6709;&#x5DEE;&#x5F02;&#xFF0C;&#x56E0;&#x4E3A;&#x8FD9;&#x65F6;&#x5176;&#x5B9E;<code>&lt;p&gt;</code>&#x8282;&#x70B9;&#x4E0B;&#x9762;&#x5305;&#x542B;&#x4E86;&#x4E24;&#x4E2A;&#x6BD7;&#x90BB;&#x7684;&#x6587;&#x672C;&#x8282;&#x70B9;&#x3002;</p>
<pre><code class="lang-javascript">el.removeChild(para.childNodes[<span class="hljs-number">1</span>]);
el.firstChild.wholeText <span class="hljs-comment">// &quot;A C&quot;</span>
el.firstChild.data <span class="hljs-comment">// &quot;A &quot;</span>
</code></pre>
<h3 id="length">length</h3>
<p><code>length</code>&#x5C5E;&#x6027;&#x8FD4;&#x56DE;&#x5F53;&#x524D;&#x6587;&#x672C;&#x8282;&#x70B9;&#x7684;&#x6587;&#x672C;&#x957F;&#x5EA6;&#x3002;</p>
<pre><code class="lang-javascript">(<span class="hljs-keyword">new</span> Text(<span class="hljs-string">&apos;Hello&apos;</span>)).length <span class="hljs-comment">// 5</span>
</code></pre>
<h3 id="nextelementsibling&#xFF0C;previouselementsibling">nextElementSibling&#xFF0C;previousElementSibling</h3>
<p><code>nextElementSibling</code>&#x5C5E;&#x6027;&#x8FD4;&#x56DE;&#x7D27;&#x8DDF;&#x5728;&#x5F53;&#x524D;&#x6587;&#x672C;&#x8282;&#x70B9;&#x540E;&#x9762;&#x7684;&#x90A3;&#x4E2A;&#x540C;&#x7EA7;&#x5143;&#x7D20;&#x8282;&#x70B9;&#x3002;&#x5982;&#x679C;&#x53D6;&#x4E0D;&#x5230;&#x5143;&#x7D20;&#x8282;&#x70B9;&#xFF0C;&#x5219;&#x8FD4;&#x56DE;<code>null</code>&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// HTML &#x4E3A;</span>
<span class="hljs-comment">// &lt;div&gt;Hello &lt;em&gt;World&lt;/em&gt;&lt;/div&gt;</span>
<span class="hljs-keyword">var</span> tn = <span class="hljs-built_in">document</span>.querySelector(<span class="hljs-string">&apos;div&apos;</span>).firstChild;
tn.nextElementSibling
<span class="hljs-comment">// &lt;em&gt;World&lt;/em&gt;</span>
</code></pre>
<p><code>previousElementSibling</code>&#x5C5E;&#x6027;&#x8FD4;&#x56DE;&#x5F53;&#x524D;&#x6587;&#x672C;&#x8282;&#x70B9;&#x524D;&#x9762;&#x6700;&#x8FD1;&#x7684;&#x540C;&#x7EA7;&#x5143;&#x7D20;&#x8282;&#x70B9;&#x3002;&#x5982;&#x679C;&#x53D6;&#x4E0D;&#x5230;&#x5143;&#x7D20;&#x8282;&#x70B9;&#xFF0C;&#x5219;&#x8FD4;&#x56DE;<code>null&#xFF1A;</code>&#x3002;</p>
<h2 id="text-&#x8282;&#x70B9;&#x7684;&#x65B9;&#x6CD5;">Text &#x8282;&#x70B9;&#x7684;&#x65B9;&#x6CD5;</h2>
<h3 id="appenddata&#xFF0C;deletedata&#xFF0C;insertdata&#xFF0C;replacedata&#xFF0C;substringdata">appendData()&#xFF0C;deleteData()&#xFF0C;insertData()&#xFF0C;replaceData()&#xFF0C;subStringData()</h3>
<p>&#x4EE5;&#x4E0B;5&#x4E2A;&#x65B9;&#x6CD5;&#x90FD;&#x662F;&#x7F16;&#x8F91;<code>Text</code>&#x8282;&#x70B9;&#x6587;&#x672C;&#x5185;&#x5BB9;&#x7684;&#x65B9;&#x6CD5;&#x3002;</p>
<ul>
<li><code>appendData()</code>&#xFF1A;&#x5728;<code>Text</code>&#x8282;&#x70B9;&#x5C3E;&#x90E8;&#x8FFD;&#x52A0;&#x5B57;&#x7B26;&#x4E32;&#x3002;</li>
<li><code>deleteData()</code>&#xFF1A;&#x5220;&#x9664;<code>Text</code>&#x8282;&#x70B9;&#x5185;&#x90E8;&#x7684;&#x5B50;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x7B2C;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#x4E3A;&#x5B50;&#x5B57;&#x7B26;&#x4E32;&#x5F00;&#x59CB;&#x4F4D;&#x7F6E;&#xFF0C;&#x7B2C;&#x4E8C;&#x4E2A;&#x53C2;&#x6570;&#x4E3A;&#x5B50;&#x5B57;&#x7B26;&#x4E32;&#x957F;&#x5EA6;&#x3002;</li>
<li><code>insertData()</code>&#xFF1A;&#x5728;<code>Text</code>&#x8282;&#x70B9;&#x63D2;&#x5165;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x7B2C;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#x4E3A;&#x63D2;&#x5165;&#x4F4D;&#x7F6E;&#xFF0C;&#x7B2C;&#x4E8C;&#x4E2A;&#x53C2;&#x6570;&#x4E3A;&#x63D2;&#x5165;&#x7684;&#x5B50;&#x5B57;&#x7B26;&#x4E32;&#x3002;</li>
<li><code>replaceData()</code>&#xFF1A;&#x7528;&#x4E8E;&#x66FF;&#x6362;&#x6587;&#x672C;&#xFF0C;&#x7B2C;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#x4E3A;&#x66FF;&#x6362;&#x5F00;&#x59CB;&#x4F4D;&#x7F6E;&#xFF0C;&#x7B2C;&#x4E8C;&#x4E2A;&#x53C2;&#x6570;&#x4E3A;&#x9700;&#x8981;&#x88AB;&#x66FF;&#x6362;&#x6389;&#x7684;&#x957F;&#x5EA6;&#xFF0C;&#x7B2C;&#x4E09;&#x4E2A;&#x53C2;&#x6570;&#x4E3A;&#x65B0;&#x52A0;&#x5165;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#x3002;</li>
<li><code>subStringData()</code>&#xFF1A;&#x7528;&#x4E8E;&#x83B7;&#x53D6;&#x5B50;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x7B2C;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#x4E3A;&#x5B50;&#x5B57;&#x7B26;&#x4E32;&#x5728;<code>Text</code>&#x8282;&#x70B9;&#x4E2D;&#x7684;&#x5F00;&#x59CB;&#x4F4D;&#x7F6E;&#xFF0C;&#x7B2C;&#x4E8C;&#x4E2A;&#x53C2;&#x6570;&#x4E3A;&#x5B50;&#x5B57;&#x7B26;&#x4E32;&#x957F;&#x5EA6;&#x3002;</li>
</ul>
<pre><code class="lang-javascript"><span class="hljs-comment">// HTML &#x4EE3;&#x7801;&#x4E3A;</span>
<span class="hljs-comment">// &lt;p&gt;Hello World&lt;/p&gt;</span>
<span class="hljs-keyword">var</span> pElementText = <span class="hljs-built_in">document</span>.querySelector(<span class="hljs-string">&apos;p&apos;</span>).firstChild;

pElementText.appendData(<span class="hljs-string">&apos;!&apos;</span>);
<span class="hljs-comment">// &#x9875;&#x9762;&#x663E;&#x793A; Hello World!</span>
pElementText.deleteData(<span class="hljs-number">7</span>, <span class="hljs-number">5</span>);
<span class="hljs-comment">// &#x9875;&#x9762;&#x663E;&#x793A; Hello W</span>
pElementText.insertData(<span class="hljs-number">7</span>, <span class="hljs-string">&apos;Hello &apos;</span>);
<span class="hljs-comment">// &#x9875;&#x9762;&#x663E;&#x793A; Hello WHello</span>
pElementText.replaceData(<span class="hljs-number">7</span>, <span class="hljs-number">5</span>, <span class="hljs-string">&apos;World&apos;</span>);
<span class="hljs-comment">// &#x9875;&#x9762;&#x663E;&#x793A; Hello WWorld</span>
pElementText.substringData(<span class="hljs-number">7</span>, <span class="hljs-number">10</span>);
<span class="hljs-comment">// &#x9875;&#x9762;&#x663E;&#x793A;&#x4E0D;&#x53D8;&#xFF0C;&#x8FD4;&#x56DE;&quot;World &quot;</span>
</code></pre>
<h3 id="remove">remove()</h3>
<p><code>remove</code>&#x65B9;&#x6CD5;&#x7528;&#x4E8E;&#x79FB;&#x9664;&#x5F53;&#x524D;<code>Text</code>&#x8282;&#x70B9;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// HTML &#x4EE3;&#x7801;&#x4E3A;</span>
<span class="hljs-comment">// &lt;p&gt;Hello World&lt;/p&gt;</span>
<span class="hljs-built_in">document</span>.querySelector(<span class="hljs-string">&apos;p&apos;</span>).firstChild.remove()
<span class="hljs-comment">// &#x73B0;&#x5728; HTML &#x4EE3;&#x7801;&#x4E3A;</span>
<span class="hljs-comment">// &lt;p&gt;&lt;/p&gt;</span>
</code></pre>
<h3 id="splittext">splitText()</h3>
<p><code>splitText</code>&#x65B9;&#x6CD5;&#x5C06;<code>Text</code>&#x8282;&#x70B9;&#x4E00;&#x5206;&#x4E3A;&#x4E8C;&#xFF0C;&#x53D8;&#x6210;&#x4E24;&#x4E2A;&#x6BD7;&#x90BB;&#x7684;<code>Text</code>&#x8282;&#x70B9;&#x3002;&#x5B83;&#x7684;&#x53C2;&#x6570;&#x5C31;&#x662F;&#x5206;&#x5272;&#x4F4D;&#x7F6E;&#xFF08;&#x4ECE;&#x96F6;&#x5F00;&#x59CB;&#xFF09;&#xFF0C;&#x5206;&#x5272;&#x5230;&#x8BE5;&#x4F4D;&#x7F6E;&#x7684;&#x5B57;&#x7B26;&#x524D;&#x7ED3;&#x675F;&#x3002;&#x5982;&#x679C;&#x5206;&#x5272;&#x4F4D;&#x7F6E;&#x4E0D;&#x5B58;&#x5728;&#xFF0C;&#x5C06;&#x62A5;&#x9519;&#x3002;</p>
<p>&#x5206;&#x5272;&#x540E;&#xFF0C;&#x8BE5;&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x5206;&#x5272;&#x4F4D;&#x7F6E;&#x540E;&#x65B9;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x800C;&#x539F;<code>Text</code>&#x8282;&#x70B9;&#x53D8;&#x6210;&#x53EA;&#x5305;&#x542B;&#x5206;&#x5272;&#x4F4D;&#x7F6E;&#x524D;&#x65B9;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// html &#x4EE3;&#x7801;&#x4E3A; &lt;p id=&quot;p&quot;&gt;foobar&lt;/p&gt;</span>
<span class="hljs-keyword">var</span> p = <span class="hljs-built_in">document</span>.getElementById(<span class="hljs-string">&apos;p&apos;</span>);
<span class="hljs-keyword">var</span> textnode = p.firstChild;

<span class="hljs-keyword">var</span> newText = textnode.splitText(<span class="hljs-number">3</span>);
newText <span class="hljs-comment">// &quot;bar&quot;</span>
textnode <span class="hljs-comment">// &quot;foo&quot;</span>
</code></pre>
<p>&#x7236;&#x5143;&#x7D20;&#x8282;&#x70B9;&#x7684;<code>normalize</code>&#x65B9;&#x6CD5;&#x53EF;&#x4EE5;&#x5C06;&#x6BD7;&#x90BB;&#x7684;&#x4E24;&#x4E2A;<code>Text</code>&#x8282;&#x70B9;&#x5408;&#x5E76;&#x3002;</p>
<p>&#x63A5;&#x4E0A;&#x9762;&#x7684;&#x4F8B;&#x5B50;&#xFF0C;&#x6587;&#x672C;&#x8282;&#x70B9;&#x7684;<code>splitText</code>&#x65B9;&#x6CD5;&#x5C06;&#x4E00;&#x4E2A;<code>Text</code>&#x8282;&#x70B9;&#x5206;&#x5272;&#x6210;&#x4E24;&#x4E2A;&#xFF0C;&#x7236;&#x5143;&#x7D20;&#x7684;<code>normalize</code>&#x65B9;&#x6CD5;&#x53EF;&#x4EE5;&#x5B9E;&#x73B0;&#x9006;&#x64CD;&#x4F5C;&#xFF0C;&#x5C06;&#x5B83;&#x4EEC;&#x5408;&#x5E76;&#x3002;</p>
<pre><code class="lang-javascript">p.childNodes.length <span class="hljs-comment">// 2</span>

<span class="hljs-comment">// &#x5C06;&#x6BD7;&#x90BB;&#x7684;&#x4E24;&#x4E2A; Text &#x8282;&#x70B9;&#x5408;&#x5E76;</span>
p.normalize();
p.childNodes.length <span class="hljs-comment">// 1</span>
</code></pre>
<h2 id="documentfragment-&#x8282;&#x70B9;">DocumentFragment &#x8282;&#x70B9;</h2>
<p><code>DocumentFragment</code>&#x8282;&#x70B9;&#x4EE3;&#x8868;&#x4E00;&#x4E2A;&#x6587;&#x6863;&#x7684;&#x7247;&#x6BB5;&#xFF0C;&#x672C;&#x8EAB;&#x5C31;&#x662F;&#x4E00;&#x4E2A;&#x5B8C;&#x6574;&#x7684; DOM &#x6811;&#x5F62;&#x7ED3;&#x6784;&#x3002;&#x5B83;&#x6CA1;&#x6709;&#x7236;&#x8282;&#x70B9;&#xFF0C;<code>parentNode</code>&#x8FD4;&#x56DE;<code>null</code>&#xFF0C;&#x4F46;&#x662F;&#x53EF;&#x4EE5;&#x63D2;&#x5165;&#x4EFB;&#x610F;&#x6570;&#x91CF;&#x7684;&#x5B50;&#x8282;&#x70B9;&#x3002;&#x5B83;&#x4E0D;&#x5C5E;&#x4E8E;&#x5F53;&#x524D;&#x6587;&#x6863;&#xFF0C;&#x64CD;&#x4F5C;<code>DocumentFragment</code>&#x8282;&#x70B9;&#xFF0C;&#x8981;&#x6BD4;&#x76F4;&#x63A5;&#x64CD;&#x4F5C; DOM &#x6811;&#x5FEB;&#x5F97;&#x591A;&#x3002;</p>
<p>&#x5B83;&#x4E00;&#x822C;&#x7528;&#x4E8E;&#x6784;&#x5EFA;&#x4E00;&#x4E2A; DOM &#x7ED3;&#x6784;&#xFF0C;&#x7136;&#x540E;&#x63D2;&#x5165;&#x5F53;&#x524D;&#x6587;&#x6863;&#x3002;<code>document.createDocumentFragment</code>&#x65B9;&#x6CD5;&#xFF0C;&#x4EE5;&#x53CA;&#x6D4F;&#x89C8;&#x5668;&#x539F;&#x751F;&#x7684;<code>DocumentFragment</code>&#x6784;&#x9020;&#x51FD;&#x6570;&#xFF0C;&#x53EF;&#x4EE5;&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x7A7A;&#x7684;<code>DocumentFragment</code>&#x8282;&#x70B9;&#x3002;&#x7136;&#x540E;&#x518D;&#x4F7F;&#x7528;&#x5176;&#x4ED6; DOM &#x65B9;&#x6CD5;&#xFF0C;&#x5411;&#x5176;&#x6DFB;&#x52A0;&#x5B50;&#x8282;&#x70B9;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> docFrag = <span class="hljs-built_in">document</span>.createDocumentFragment();
<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E;</span>
<span class="hljs-keyword">var</span> docFrag = <span class="hljs-keyword">new</span> DocumentFragment();

<span class="hljs-keyword">var</span> li = <span class="hljs-built_in">document</span>.createElement(<span class="hljs-string">&apos;li&apos;</span>);
li.textContent = <span class="hljs-string">&apos;Hello World&apos;</span>;
docFrag.appendChild(li);

<span class="hljs-built_in">document</span>.querySelector(<span class="hljs-string">&apos;ul&apos;</span>).appendChild(docFrag);
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x521B;&#x5EFA;&#x4E86;&#x4E00;&#x4E2A;<code>DocumentFragment</code>&#x8282;&#x70B9;&#xFF0C;&#x7136;&#x540E;&#x5C06;&#x4E00;&#x4E2A;<code>li</code>&#x8282;&#x70B9;&#x6DFB;&#x52A0;&#x5728;&#x5B83;&#x91CC;&#x9762;&#xFF0C;&#x6700;&#x540E;&#x5C06;<code>DocumentFragment</code>&#x8282;&#x70B9;&#x79FB;&#x52A8;&#x5230;&#x539F;&#x6587;&#x6863;&#x3002;</p>
<p>&#x6CE8;&#x610F;&#xFF0C;<code>DocumentFragment</code>&#x8282;&#x70B9;&#x672C;&#x8EAB;&#x4E0D;&#x80FD;&#x88AB;&#x63D2;&#x5165;&#x5F53;&#x524D;&#x6587;&#x6863;&#x3002;&#x5F53;&#x5B83;&#x4F5C;&#x4E3A;<code>appendChild()</code>&#x3001;<code>insertBefore()</code>&#x3001;<code>replaceChild()</code>&#x7B49;&#x65B9;&#x6CD5;&#x7684;&#x53C2;&#x6570;&#x65F6;&#xFF0C;&#x662F;&#x5B83;&#x7684;&#x6240;&#x6709;&#x5B50;&#x8282;&#x70B9;&#x63D2;&#x5165;&#x5F53;&#x524D;&#x6587;&#x6863;&#xFF0C;&#x800C;&#x4E0D;&#x662F;&#x5B83;&#x81EA;&#x8EAB;&#x3002;&#x4E00;&#x65E6;<code>DocumentFragment</code>&#x8282;&#x70B9;&#x88AB;&#x6DFB;&#x52A0;&#x8FDB;&#x5F53;&#x524D;&#x6587;&#x6863;&#xFF0C;&#x5B83;&#x81EA;&#x8EAB;&#x5C31;&#x53D8;&#x6210;&#x4E86;&#x7A7A;&#x8282;&#x70B9;&#xFF08;<code>textContent</code>&#x5C5E;&#x6027;&#x4E3A;&#x7A7A;&#x5B57;&#x7B26;&#x4E32;&#xFF09;&#xFF0C;&#x53EF;&#x4EE5;&#x88AB;&#x518D;&#x6B21;&#x4F7F;&#x7528;&#x3002;&#x5982;&#x679C;&#x60F3;&#x8981;&#x4FDD;&#x5B58;<code>DocumentFragment</code>&#x8282;&#x70B9;&#x7684;&#x5185;&#x5BB9;&#xFF0C;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;<code>cloneNode</code>&#x65B9;&#x6CD5;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">document</span>
  .querySelector(<span class="hljs-string">&apos;ul&apos;</span>)
  .appendChild(docFrag.cloneNode(<span class="hljs-literal">true</span>));
</code></pre>
<p>&#x4E0A;&#x9762;&#x8FD9;&#x6837;&#x6DFB;&#x52A0;<code>DocumentFragment</code>&#x8282;&#x70B9;&#x8FDB;&#x5165;&#x5F53;&#x524D;&#x6587;&#x6863;&#xFF0C;&#x4E0D;&#x4F1A;&#x6E05;&#x7A7A;<code>DocumentFragment</code>&#x8282;&#x70B9;&#x3002;</p>
<p>&#x4E0B;&#x9762;&#x662F;&#x4E00;&#x4E2A;&#x4F8B;&#x5B50;&#xFF0C;&#x4F7F;&#x7528;<code>DocumentFragment</code>&#x53CD;&#x8F6C;&#x4E00;&#x4E2A;&#x6307;&#x5B9A;&#x8282;&#x70B9;&#x7684;&#x6240;&#x6709;&#x5B50;&#x8282;&#x70B9;&#x7684;&#x987A;&#x5E8F;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">reverse</span>(<span class="hljs-params">n</span>) </span>{
  <span class="hljs-keyword">var</span> f = <span class="hljs-built_in">document</span>.createDocumentFragment();
  <span class="hljs-keyword">while</span>(n.lastChild) f.appendChild(n.lastChild);
  n.appendChild(f);
}
</code></pre>
<p><code>DocumentFragment</code>&#x8282;&#x70B9;&#x5BF9;&#x8C61;&#x6CA1;&#x6709;&#x81EA;&#x5DF1;&#x7684;&#x5C5E;&#x6027;&#x548C;&#x65B9;&#x6CD5;&#xFF0C;&#x5168;&#x90E8;&#x7EE7;&#x627F;&#x81EA;<code>Node</code>&#x8282;&#x70B9;&#x548C;<code>ParentNode</code>&#x63A5;&#x53E3;&#x3002;&#x4E5F;&#x5C31;&#x662F;&#x8BF4;&#xFF0C;<code>DocumentFragment</code>&#x8282;&#x70B9;&#x6BD4;<code>Node</code>&#x8282;&#x70B9;&#x591A;&#x51FA;&#x4EE5;&#x4E0B;&#x56DB;&#x4E2A;&#x5C5E;&#x6027;&#x3002;</p>
<ul>
<li><code>children</code>&#xFF1A;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x52A8;&#x6001;&#x7684;<code>HTMLCollection</code>&#x96C6;&#x5408;&#x5BF9;&#x8C61;&#xFF0C;&#x5305;&#x62EC;&#x5F53;&#x524D;<code>DocumentFragment</code>&#x5BF9;&#x8C61;&#x7684;&#x6240;&#x6709;&#x5B50;&#x5143;&#x7D20;&#x8282;&#x70B9;&#x3002;</li>
<li><code>firstElementChild</code>&#xFF1A;&#x8FD4;&#x56DE;&#x5F53;&#x524D;<code>DocumentFragment</code>&#x5BF9;&#x8C61;&#x7684;&#x7B2C;&#x4E00;&#x4E2A;&#x5B50;&#x5143;&#x7D20;&#x8282;&#x70B9;&#xFF0C;&#x5982;&#x679C;&#x6CA1;&#x6709;&#x5219;&#x8FD4;&#x56DE;<code>null</code>&#x3002;</li>
<li><code>lastElementChild</code>&#xFF1A;&#x8FD4;&#x56DE;&#x5F53;&#x524D;<code>DocumentFragment</code>&#x5BF9;&#x8C61;&#x7684;&#x6700;&#x540E;&#x4E00;&#x4E2A;&#x5B50;&#x5143;&#x7D20;&#x8282;&#x70B9;&#xFF0C;&#x5982;&#x679C;&#x6CA1;&#x6709;&#x5219;&#x8FD4;&#x56DE;<code>null</code>&#x3002;</li>
<li><code>childElementCount</code>&#xFF1A;&#x8FD4;&#x56DE;&#x5F53;&#x524D;<code>DocumentFragment</code>&#x5BF9;&#x8C61;&#x7684;&#x6240;&#x6709;&#x5B50;&#x5143;&#x7D20;&#x6570;&#x91CF;&#x3002;</li>
</ul>




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